RM-3709: replaced ADD with COPY, used exec form in CMD (#11)

Author: mir-jalal

server-db/src/main/resources/db/Dockerfile

@@ -8,8 +8,8 @@ WORKDIR /liquibase/changelog
 
 COPY changelog/db.changelog-master.yaml ./
 # create dir structure as specified in changelog file above
-ADD changelog/changes ./db/changelog/changes
+COPY changelog/changes ./db/changelog/changes
 
 COPY liquibase.properties.docker ./liquibase.properties
 
-CMD liquibase --url=$DB_URL --username=$DB_USER --password=${DB_PASSWORD} update
+CMD ["liquibase", "--url=$DB_URL", "--username=$DB_USER", "--password=${DB_PASSWORD}", "update"]